Device for laser drilling

ABSTRACT

Equipment for laser-drilling having an optical component or feed module with a set of lasers, the active optical fiber, in the form of hollow coil, the excitation of the laser active medium made through the coupling of the light emitted by laser diodes inside the active fiber, and a mechanical component that is an optic drill bit with a hollow rigid body and an end of any geometry, the drill bit having leaky orifices for the optical fibers connection or bundle of optical fibers with drill bit walls and orifices to allow the drilling and cooling fluids are released in the surface to be drilled, the optical fibers being provided from the feed module. The feed module generates high intensity light generation that through optical fibers is guided to the optic drill bit. The feed module and the optic drill bit are coupled to a drill string.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to the field of equipments forlaser-drilling, and more specifically to such equipment comprising anoptical drill bit and a feed module with lasers embedded.

2. Prior Art

A solution for the problems associated to the use of conventionaldrilling equipment that employs drilling bits that comprise one or morecutting mechanical elements was the use of laser beams as a mean ofdrilling wells in the ground.

Thus, U.S. Pat. No. 3,871,485 teaches a drilling process using a laserbeam wherein a laser beam generator connected to a voltage generatorfined by drilling mud or other liquid that passes through a laser beamslot connected to the drill string is positioned in the wellbore and acrystal reflector is positioned inside the laser beam slot to reflectthe beam in an elliptical format through the formation to be entered.

U.S. Pat. No. 4,066,138 teaches an apparatus to drill the groundassembled above the ground that drives downward a high power energylaser ring to drill a cylindrical orifice by fusing the successiveannular regions of the extraction to be entered in a power level thatsmashes and ejects the orifice successive layers.

U.S. Pat. No. 4,113,036 teaches a laser-drilling method and system torecover fossil fuels wherein a vertical bore is drilled in anunderground formation; a laser beam is projected through the verticalbore and reflected horizontally from the orifice through the formationalong an array of bores.

U.S. Pat. No. 4,090,572 teaches a process and apparatus forlaser-treatment of geological formations where a laser beam is projectedthrough a guide for the light beam in a wellbore along a beam guideproviding enough energy lasers to melt or vaporize formations underunderground conditions.

Despite all advantages associated to the use of this drilling method, itis not based on the physical contact between the drill bit and thesurface to be drilled (among them, the drilling speed, lack of physicalcontact between the drilling bit and the surface to be drilled, energyefficiency, etc.), the lasers utilization in drilling wells was notdeveloped at trade levels in function of the lack of lasers with minimalpower needed for efficient and competitive drilling when compared tomechanical equipments.

Other problems that limited the practical implementation of thelaser-well drilling were the lasers dimensions that make its insertionin the orifices (wells) drilled impossible as well as the nonexistenceof efficient (with low losses by constraint, high transparency andcontrol of susceptibility to nonlinear phenomenon induction) opticalconductors (optical fibers), that allows the guidance of the laser lightto long distances and in places with small dimensions and difficultaccess.

U.S. Pat. No. 5,107,936 teaches a hot-drilling process that employslaser beams as heat source in which the wellbore profile is melted bythe heat source and the resulting molten stone is pressed by theneighbor side stone during the drilling process.

In the late 1990's and early 2000's compact and high power laserssystems became commercially available and the interest in itsutilization in wells drilling is renewed. Despite the high power lasersdevelopment (based on different types and active materials, for example,gas, dyes, semiconductor, crystal, optical fiber doped or not, etc.) theoptical fibers development (mono-mode, multi-mode and with severalprofiles of the cross-section index of refraction and materials) withhigh transparency, low losses by constraint and control ofnon-linearities constitute other motivating factor to use high intensitylaser light for drilling.

With the use of optical fibers it is possible to guide the highintensity laser light to long distances (some tens of kilometers) andkeep the laser light quality (temporal and special intensity andcoherencies) in the fiber outlet sufficiently high ensuring the deliveryof high optical densities—condition that increases the drilling processefficiency.

In this regard, the patents literature point out the following recentdocuments about the subject matter.

U.S. Pat. No. 6,365,871 relates to a laser-drilling method through thetool as nozzle (40), in cavity that comprises the drilling bore (41)through the tool (40) with laser (50), providing fluid with laserbarrier properties in the cavity so, when the bore (41) is open for thecavity, the laser light passing through the bore (41) is incident overthe fluid whereby the tool (40) transversal to the cavity from the bore(41) is protected from the laser light, and causing the fluid does notenter in the drilled bore (41) by laser during the drilling process. Theapparatus to perform the method is also described.

U.S. Pat. No. 6,626,249 describes the drilling and recovery geothermalsystem that comprises a drilling rig having a riser with laser and radarperforation assembled in the said elevator, drilling pipe, rotatorymirror assembled adjacent to the lower end of the said drilling pipe anddevices to establish vacuum adjacent to the said lower end of thedrilling pipe in order to remover and recover heat and drilling waste.

U.S. Pat. No. 6,755,262 relates to a well drilling apparatus that can beat least partially placed in a drilling well. The apparatus includes aplurality of optical fibers, each one of them has an end near to theenergy inlet and an end far from the energy outlet of the optical fiber.At least a focus lens is arranged in the far end from the optical fiberlight outlet. The focus lens is placed to receive energy from the farend from the optical fiber light outlet corresponding to at least oneoptical fiber and focus the same outward the optical fiber light outlet.

U.S. Pat. No. 6,870,128 describes the well drilling method with laserbeam, the method comprising to guide the laser beam inside the conduit,where the laser beam is guided through the conduit by internalreflectivity of the said conduit, and extending the conduit inside thewell, so the laser beam exiting the conduit is guided over the area inthe well to be drilled. A system for drilling well with laser beam isequally provided, the system comprising a device to guide the laser beaminside the conduit, wherein the laser beam is guided through the conduitby internal reflectivity of the said conduit, and device to extend theconduit inside the well, so the laser beam exiting the conduit is guidedto an area in the well to be drilled. The invention further provides anapparatus composed of conduit that can be extended inside the well, andthe surface inside the conduit, where the internal surface is reflectiveto the laser beam.

U.S. Pat. No. 6,888,097 B2 describes an apparatus for drilling wellwalls, the apparatus including an optical fiber cable with an end forlaser input and an end for laser output. A source of laser is connectedto the end of the laser input and a laser head is connected to the endof the laser output. The laser head includes a laser control componentto control at least a feature of the laser beam. Control elements in thelaser head to control the movement and localization of the laser headare connected to the optical fiber cable. The laser head is protected ina slot that protects the optical fiber cable and elements as reflectorsand lens to control the laser beam emitted by optical fiber cable therearranged, from the aggressive environment found in undergroundoperations.

U.S. Pat. No. 7,147,064 describes a drilling apparatus to drill a wellhaving a drilling bit set that includes a laser cutting mount and avacuum mount. The vacuum mount is adapted to collect steams generated bythe laser cutting mount near the drilling bit set during the drillingapparatus operation. Steams collected can thus be processed by achromatographic analyzer to determine the features of the rock formationbeing drilled.

In U.S. Pat. No. 7,487,834 a method for wells drilling with high powerlaser is described intended to provide a laser beam to the wellproduction zone to drill the coating, the cement, and to form highpermeability penetrations in the formation of stone reservoir toincrease the gas flow and/or oil to the well. The laser beam is providedto a punch laser positioned in the production zone by an opticalfiber-cable, the cable being sloped around 90 degrees and formatted inthe desired beam orientation and profile. A cutting nozzle in the punchend provides a cleaning flow to 1) remove from the well droplets ofmolten metal, and cement and stone broken fragments that can block thelaser beam and 2) create a free pathway through the well liquidsallowing the beam to reach the target surface during the drilling.

U.S. Pat. No. 7,416,258 describes the equipment and method to use lasersin the stones breaking and drilling. A group of laser beams is handledin a controlled way by an electro-optical key to locations on the stonesurface, creating multiple orifices and removing a stone layer at thediameter desired. Only a single laser beam irradiating about 1000 to5000 W/cm² breaks the stone. The three-dimensional stone removal isperformed by breaking the consecutive layers with the laser headintermittent perpendicular movement to the stone surface just drilled.

US Patent Publication US 20100078414 A1 relates to an apparatus forunderground drilling having at least one optical fiber to transmit lightenergy from an energy laser source arranged above the ground towards anunderground drilling location and a mechanical drill bit having at leastone cutting surface and forming at least a light transmission channelaligned to transmit the light from at least one optical fiber through amechanical drill bit using at least one light transmission channel. Itis alleged the equipment developed is especially proper for non verticalwells.

Brazilian patent published P10806638-8 (Laser drilling system andmethod), of the same authors of the present document, describes anoptical drill bit (104) integrated to a laser-drilling system. However,this patent application does not describe details of the said drill bit.

It is important to highlight that even in the inventions that proposethe use of optical fiber(s) to delivery high intensity laser light inregions of bottom hole there is no practical demonstration of thispossibility when fiber long passages are considered (deep wells,i.e. >hundreds of meters). The main reason for this is the non-linearphenomenon induction during high intensity laser light propagation forfiber long passages, which is responsible for mitigate the guided light,degrade fiber transparencies and, depending on the energy density and/orpeak energy inside the fiber, can damage permanently the optical fiber.This problem is classic in the optic guided and many research groups andcompanies have been making efforts to reduce or eliminate them. In thisrespect, see the summary by A. Mendes & T. F. Morse, “Specialty OpticalFibers Handbook”, Chapter 22, pp. 671-696, Elsevier Publisher, 2007.

Among several lasers technologies, it is important to highlight theoptical fiber-laser development where the high intensity laser light isgenerated inside the optical fiber itself. This laser is compact and ingeneral does not require cooling even when operating with highintensities (≧kW). Furthermore, the losses by coupling of the light inthe laser outlet, with conductor optical fiber (responsible to guide thehigh intensity laser light for long distances up to the interest region)are minimal once it is the fiber-fiber coupling and not the fiberwithout free space.

Regarding the laser light wavelength, it is noted the commercialavailability of high power lasers systems with wavelengths varied (fromultraviolet to infrared), depending on the active element and on thelaser cavity design, and lasers with tunable wavelength. This meansthat, depending on the surface material to be drilled, it is possible touse the drilling wavelength coinciding with the absorption range of thismaterial. This significantly increases the process efficiency. Thus,during the drilling it is possible to select in real time the moreappropriate laser light wavelength to the surface. This is othertechnological advantage of the laser-drilling regarding a conventionalmechanical system.

Therefore, it would be advantageous that the art had one laser-drillingequipment able to generate high intensity light, such light being guidedthrough optical fibers up to one optical drill, such drill bit being themechanical component that supports optical fibers, provides geometricalcontrol to high intensity light action and promotes the drilling systeminterface with the surface to be drilled.

Regarding the researched literature, no documents anticipating orsuggesting the teachings of the present invention were obtained, so thesolution here proposed has novelty and inventive step toward to thestate of the art.

BRIEF SUMMARY OF THE INVENTION

Widely, the laser-drilling equipment according to the inventioncomprises:

a) An optical component or feed module, consisting of a set of opticalfiber-lasers, active, in the shape of hollow coil, the excitation of thelaser active medium being made through the coupling of the light emittedby lasers diodes inside the active fiber, the said diodes beingconnected more efficiently to the active fiber coil considering theavailable space and the needed heat transfer to maintain the diodesoperation temperature; and

b) A mechanical component that is an optical drill bit with rigid andhollow body and end of any geometry, the said drill bit being adopted ofleaky orifices for optical fibers connection or bundle of optical fiberswith drill bit walls and orifices to allow the drilling and coolingfluids to be released in the surface to be drilled, the optical fibersor bundle of optical fibers being derived from the said feed module,where the feed module is responsible for high intensity light generationthat through optical fibers is guided up to optical drill bit, the saidfeed module and the optical drill bit being coupled to a drill string.

For the said drill bit head with spherical geometry, it is determined anangle α from the line drawn in the middle of the ball and perpendicularto the optical drill bit body connection direction with the drill stringup to the ball intersection with the drill bit remaining body. Thisangle defines the operation maximum angle of the optical drill bit andconsequently the maximum slope of the well or drilled bore.

Thus, the invention provides an equipment for laser-drilling where thelaser system is responsible for high intensity light generation thatthrough optical fibers is guided up to optical drill bit, this being themechanical component that supports the optical fibers, providesgeometrical control to high intensity light action and promotes theinterface of the drilling system with the surface to be drilled.

The invention further provides an equipment for laser-drilling with areduced number of moveable mechanic parts present in the drillingsystem.

The invention provides an equipment for laser-drilling thatsignificantly reduces the need of drill string rotation, with largeoperational advantage.

The invention also provides an equipment for laser-drilling able tomonitor the drilling process in situ, with process control increase.

The invention further provides an equipment for laser-drilling able todrill different materials without the need to substitute the drill bit.

The invention also provides an equipment for laser-drilling wheredepending on the material to be drilled in different wavelengths of thelaser light are triggered to increase the drilling efficiency.

The invention further provides an equipment for laser-drilling where itis possible to use different systems of operation as ongoing or pulse.

The invention also provides an equipment for laser-drilling with reducedmaintenance costs.

The invention further provides an equipment for laser-drilling where thetectonic movement risks, caused by drilling are reduced due to the lackof contact between the optical drill bit and the surface to be drilled.

The invention also provides an equipment for laser-drilling where thedrilling system dimensions are lower and this is also lighter thantraditional systems.

The invention further provides an equipment for laser-drilling wheregenerally it is possible to maintain higher control of the drillingdepth and the drilling direction.

The invention also provides an equipment for laser-drilling where due tomechanical strength increase of the drilled well walls against wallssurface vitrification, it is reasonable to speculate on reducing theneed for coating during the drilling.

The invention further provides an equipment for laser-drilling thatallows the drilling direction control through the drill bit format,where the angle control a enables the drill bit drills orifices to adegrees of the drill bit middle line.

The invention also provides an equipment for laser-drilling with lasersindividual control that feed the light interaction points with thesurface, to determine the drilling direction turning the lasers on oroff in specific regions of the drill bit as needed.

These and other objects of the invention are immediately appreciated bythose skilled in the art and by companies with interests in the segment,and will be described in sufficient detail to be reproduced in thefollowing description.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an optical drill bit section of the drilling equipment of theinvention showing the head and the body of the same.

FIG. 2 is a view of the laser system or feed module of the drillingequipment of the invention.

FIG. 3 is a general section of the equipment assembled in a drillstring, with feed module and optical drill bit.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The examples herein shown aim only to illustrate one of the numerousways of performing the invention, however, without limiting the scope ofthe same.

Thus, the invention relates to an equipment for laser-drilling where thelaser system is responsible for high intensity light generation thatthrough optical fibers is guided up to optical drill bit, this being themechanical component that supports optical fibers and promotes theinterface of the drilling system with the surface to be drilled.

The equipment for drilling oil wells according to the invention,composed of feed module and optical drill bit, can be directlyintegrated to drilling conventional systems and can operate at anydepth.

The feed module is fed by an electricity metal conductor, the saidmodule consisting of a set of lasers, that generate the light with highintensity for drilling, and it is coupled between the drill string andthe drill bit, as can be seen in FIG. 3. The light emitted by lasers isguided up to optical drill bit through optical fibers.

The mechanical flexibility in the energy conduction responsible fordrilling up to optical drill bit, provided by optical fibers allow theidealization of virtually any optical drill bit format.

According to the present invention concept, for each point of laserlight interaction with the stone to be drilled there is an optical fiberproviding high intensity laser light. Associated to each fiber may be alaser or multiple lasers combined producing the light for drilling. Alllasers used in the drilling are embedded with the drill bit in thecylindrical device consisting of standard tube employed in the drillstring with internal modifications needed to pack lasers. Thus, laserswith the support cylinder form the feed module. Therefore, the mainfunction of this module is generating and supplying high intensity laserlight for the optical drill bit.

FIG. 3 shows the feed module coupled to optical drill bit.

Advantageously, the equipment modular feature of the invention eases theimplementation of the same once each part can be developed and testedindependently. For example, it is possible to firstly develop a modularlaser that can operate inside a cylinder and in the conditions ofpressure and temperature found in the bottom of a well and that furtherhas conditions to generate light energy sufficient for drilling a stone.With this laser (that corresponds to only one point of laser lightinteraction with the stone in the optical drill) it is estimated theaction effective area in the stone and consequently it is determined thenumber of active points in the optical drill bit, which correspondsdirectly to the number of the feed module lasers.

In addition, it is possible to evaluate constructive details of thefiber coupling to the laser and the fiber to the optical drill bit.

Further advantageously, i) the fact of having the laser embedded withthe optical drill bit significantly reduces the drilling systemcomplexity; ii) problems with the optical fiber mechanical fragility,loss of optical properties with the hydrogen diffusion, in the case ofsilica fibers, as well as limitation with the power level transmittedover long distances (responsible for non linear phenomenon induction),etc. are eliminated.

On the other hand, it is necessary the lasers, which will be embeddedwith the drill bit, to support the operation in unconventionalconditions, high external hydrostatic pressures and increasedtemperatures. In addition, they must be packed in reduced spaces such asthe interior of the drilling duct. Obviously, even thus, lasers musthave conditions to generate enough energy to promote an efficientdrilling of stones.

Based on these premises, involving operation conditions and neededlevels of energy, Applicants researches led to the development of alaser encapsulated in the shape of ring or coil that is presented inFIG. 2. It consists of a high power optical fiber-laser, the laser beingpumped by laser light emitting diodes. The light emitted by many diodesis combined to excite the optical fiber-laser active medium and thenproduce laser light with high intensity and high time consistency andsine qua non spatial condition to focus the light in the fiber outlet.

The ring or coil format with pumping diodes positioned over a half ofthe ring surface checks the modular feature to the laser project. Thisallows the lasers to be assembled on each other inside the drilling ductforming the feed module, according to FIG. 2 and FIG. 3.

The ring format also enables the drilling fluid circulation throughlasers in that, besides checking the compatibility with the remaining ofthe drilling system, where the fluid circulates inside the drill string,aids in the lasers cooling.

The light generated by lasers can be guided up to the optical drill bitby means of diffractive optical fibers which properties are ideal totransport high densities of energy. These fibers have also high damageresistance in its interfaces.

It is important to highlight the idea of using optical fiber-laserpumped by diodes is simply motivated by the light optical qualityemitted by this type of lasers. An alternative for the present inventionis to connect the diodes directly to the fiber and use the lightproduced by them to drill, without the need to set up with fiber-laser.

The optical drill bit, in general, is formed by metal structure, withspecific dimensions and shapes for each drilling process, where opticalfibers that transport the high intensity laser light are coupled in theinternal wall of the said drill bit and provide high intensity light fordrilling.

The optical drill bit admits to be configured at any dimension orphysical format needed for different drilling scenes. The end formats ofthe drill bit will depend on the type of ground or stone to be drilled,the type of drilling to be performed, the drilling diameter, the well orbore depth and the resulting curvature and/or well or bore angle.

The optical drill bit showed in FIG. 1 is an example of the drill bitfor drilling wells with diameter of 8″. Each channel, where opticalfibers are fixed, is perpendicular to the drill bit surface tangent inthe point of intersection. This ensures that the light focusesperpendicularly to the surface to be drilled in the whole drill bitcircumferential surface.

The number of channels to connect the fibers, i.e., points ofinteraction of the laser light with the stone to be drilled, depends onthe drill bit superficial area and on the individual efficiency of eachlaser in the drilling process.

The drilling efficiency is given in a simplified manner by the mass ofstone removed divided by the energy embedded in the drilling process.

Two features of the present drill bit design allow the direction controlin the drilling. The first is through the drill bit format. According towhat is shown in FIG. 1, the spherical symmetry of the drill bit allows,against angle control a (constructive parameter), the drill bit drillsbores at a degrees of the drill bit middle line.

Other feature that allows the direction control is the lasers individualcontrol that feed the points of the light interaction with the surface.It is possible to determine the direction in which it is desired todrill turning the lasers on or off in specific regions of the drill bitas needed. Thus, such as in the perforation operations, this inventioncan be used to drill bores perpendicular to the drill bit shaft, throughthe formation and passing the coating and the cement region, to allowthe oil or reservoir gas flow to the coated well.

The drill bit design further foresees channels for drilling fluid outletas showed in FIG. 1.

Example 1 Preferred Embodiment

The invention is described in the following by reference to the attachedFigures, without, however, limiting the same to the illustratedconfigurations.

FIG. 1 illustrates the optical drill bit (100) of the equipment of theinvention. In this Figure, the said drill bit has a head (130) of anyformat, herein illustrated as spherical such as a possible modalityamong others and a tubular body (140).

The angle α mentioned above is measured from the line drawn in themiddle of the ball and perpendicular to the direction of the opticaldrill bit (100) body connection with the drill string up to ballintersection with the drill bit remaining body. This angle defines theoperation maximum angle of the optical drill bit (100) and consequentlythe maximum slope of the well or drilled bore.

Leaky orifices are present in the drill bit (100) head (130), being theorifices (110) employed for optical fibers connection or bundle ofoptical fibers with drill bit walls and orifices (120) to allow thedrilling and cooling fluids to be released in the surface to be drilled.

The number of orifices (110) for optical fibers connection or bundle ofoptical fibers is determined from the drilled area by each optical fiberor bundle of optical fibers so that the whole head surface (130) in theshape of ball can have conditions to play the role of perforating.

The drill bit inner (100) is hollow, enabling the passage of the opticalfibers or bundle of optical fibers (not represented) conductive ofoptical energy for drilling and its connection to the leaky orifices(110) and also drilling and cooling fluids flow until to be released inthe surface to be drilled by leaky orifices (120).

FIG. 2 illustrates the lasers used in the equipment of the invention.

For lasers (200), that are not high intensity light sources employed inthe laser-drilling, can be integrated to the drill string, they need tobe built with specific format. In addition to being efficient high powerlight generation sources, lasers need to be packed inside the drillstring pipes and also allow the drilling fluid to pass through them. Themore appropriate architecture for this type of need is the opticalfiber-lasers. In this type of lasers, the fiber doped with rare earthion, constituting the active medium, is flexible and can be woundforming the hollow coil (210) as showed in FIG. 2.

The excitation of the laser active medium, the optical fiber doped, ismade through the coupling of the light emitted by lasers diodes (220)inside the active fiber. The lasers diodes (220) are called pumpingdiodes.

In the project presented in FIG. 2 the lasers diodes (220) areperpendicularly connected to the coil (210) of active fiber. Thus, thelaser inner (200) is completely hollow. This format mainly appreciatedthe thermal dissipation of the electro-optical conversion process of thepumping diodes. This configuration uses its own drilling fluid ascontrol agent and temperature stabilization.

It is further possible the specific fluids for cooling being injected inthe drill string inner to ensure the lasers temperature control.

The lasers diodes position (220) relatively to the active optical fibercoil (210) allow two optical fiber-lasers modules (200) to be coupled asthe indicated in FIG. 2 making the system even more compact.

The feed module is composed of the plurality of lasers (200) the opticalfiber which the light output is taken up to optical drill bit (100) bythe optical fibers (320) (see FIG. 3).

Tens of lasers (200) can be stacked along the drill string pipe asneeded, for efficient drilling.

Each laser (200) is independently controlled enabling different drillingsystems, pulse and ongoing, for example, to be employed in the drilling.

FIG. 3 shows the illustration of the equipment (300) concept of theinvention where can be noted: the optical drill bit (100), the feedmodule formed by a set of lasers (200) and the optical fibers (320)connecting each laser (200) to a specific point inside the drill bit(100). Each point of connection between the drill bit (100) and thefiber (320) is a communication channel with the drill bit externalsurface (100) and is perpendicular to the surface to be drilled, thus,the optical fiber (320) provides high intensity light directly over thesurface.

Those skilled in the art will appreciate the teachings herein presentedand will be able to reproduce the invention in the embodiments presentedand in others variants, falling within the scope in the appended claims.

1. A device for laser-drilling, comprising: a) an optical component orfeed module, comprised of a plurality of lasers (200), each one of thelasers (200) comprising flexible optical fiber (320), wound in shape ofhollow coil (210), and lasers diodes (220) perpendicularly connected tothe coil (210) of active fiber; and b) a mechanical component or opticdrill bit (100), the drill bit being gifted of: a head (130) withorifices (110) and (120), and of a body (140), wherein: i) the feedmodule is responsible for high intensity light generation that throughthe optical fibers (320) is guided to the optic drill bit (100), and ii)the feed module and the optic drill bit (100) are coupled to a drillstring.
 2. The device, according to claim 1, wherein the lasers (200)have a geometry to check the same modular characteristic and assemblingthe said lasers above each other in the drill string.
 3. The device,according to claim 1, being wherein the device is able to accept heads(130) of any format.
 4. The device, according to claim 1, wherein theoptic drill bit (100) head (130) has a spherical format.
 5. The device,according to claim 4, wherein the head (130) presents an angle thatdefines the operation maximum angle of the said optic drill bit (100).6. The device, according to claim 5, wherein the angle is determinedfrom a line drawn in the middle of a ball and perpendicular to aconnection direction to the optic drill bit (100) body connection withthe drill string up to the spherical head (130) intersection with theremaining body (140) of the drill bit (100).
 7. The device, according toclaim 5, further comprising providing direction control in the drillingthrough the optic drill bit format (100), wherein the operation anglecontrol enables the said drill bit drill orifices in the angle said,relative to a middle line of the same.
 8. The device, according to claim1, further comprising providing, for each point of laser lightinteraction with a stone to be drilled, an optical fiber (320) supplyinghigh intensity laser light.
 9. The device, according to claim 1, whereineach optical fiber (320) that is associated to a laser (200) or multiplelasers (200) is combined to produce the light for drilling.
 10. Thedevice, according to claim 1, wherein lasers (200) used in the drillingthat are embedded with the optic drill bit (100) in the device consistof a standard tube employed in the drill string.
 11. The device,according to claim 1, further comprising lasers individually controlled(200) that feed the points of the light that interacts with the surface,to determine the drilling direction turning the said lasers on or off inspecific regions of the drill bit (100) as needed.
 12. The device,according to claim 1, wherein the said orifices (110) are intended tothe optical fibers connection (320) or bundle of optical fibers with thedrill bit walls (100), while the orifices (120) allow drilling andcooling fluids to be released in the surface to be drilled.
 13. Thedevice, according to claim 1, wherein each orifice (110) wherein opticalfibers are fixed to be perpendicular to the optic drill bit (100)surface tangent in the point of intersection, ensuring the lightincidence perpendicular to the surface to be drilled in the wholesurface of the said optic drill bit.
 14. The device, according to claim1, wherein the number of orifices (110) is determined from the drilledarea by each optical fiber or bundle of optical fibers such that thewhole drill bit (100) head (130) surface is able to the drillingfunction.
 15. The device, according to claim 1, wherein the optic drillbit (100) is a mechanical component that supports the optical fibers(320), and provides geometrical control to the high intensity lightaction and promotes the interface of the said drilling device (300) withthe surface to be drilled.
 16. The device, according to claim 1, whereinthe connection of the diodes laser (220) to the coil of active fiber(210) is effected considering the space available and the heat transferneeded to maintain the operation temperature of the said lasers diodes(220).
 17. The device, according to claim 1, wherein alternativelydiodes laser (220) that are connected directly to optical fibers (320)and the light generated by the same are used for drilling, dispensingthe coils (210) of fiber-laser.
 18. The device, according to claim 1,wherein the operation system is of the pulse type.
 19. The device,according to claim 1, wherein the operation system is of the ongoingtype.